{
  "data": {
    "a": {
      "slug": "earendil-pi",
      "name": "Pi",
      "vendor": "Earendil",
      "vendorUrl": "https://pi.dev",
      "kind": "harness",
      "category": "agent-harnesses",
      "summary": "Pi is an open-source terminal coding agent from Earendil, run on the owner's machine with any of 15 or more model providers. It has interactive, print, JSON and RPC modes, a TypeScript SDK and a built-in MCP client.",
      "url": "https://www.anchorterminal.com/tools/earendil-pi",
      "markdownUrl": "https://www.anchorterminal.com/tools/earendil-pi.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/earendil-pi.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/earendil-pi.json",
      "dns": "earendil-pi.grade.anchorterminal.com",
      "repo": "https://github.com/earendil-works/pi",
      "license": "MIT",
      "transports": [],
      "packages": [
        {
          "registry": "npm",
          "name": "@earendil-works/pi-coding-agent"
        }
      ],
      "auth": "none",
      "authNotes": "No Pi account needed. Model providers are connected with `/login` (a subscription or an API key, stored in `~/.pi/agent/auth.json`) or with environment variables such as `ANTHROPIC_API_KEY`. MCP servers take headers, bearer tokens from the environment or OAuth, with tokens kept in `~/.pi/agent/mcp-auth.json`. Radius, the optional hosted gateway, needs its own sign-in or `RADIUS_API_KEY`.",
      "pricing": "free",
      "pricingNotes": "Free and MIT, with no paid edition of the harness. The owner pays the model provider. Radius, Earendil's optional hosted gateway, is an early alpha sold by prepaid credits, and no public price list was found (checked 2026-10-23).",
      "priceSummary": "Free · OSS",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the repository or the docs (checked 2026-10-23).",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 113417,
        "npmWeekly": 5201697,
        "pypiWeekly": null,
        "asOf": "2026-10-08"
      },
      "docsUrl": "https://pi.dev/docs/latest",
      "capabilities": [
        "agent.harness",
        "agent.mcp-client"
      ],
      "tags": [
        "open-source",
        "local",
        "free",
        "no-card",
        "typescript",
        "mcp",
        "json-output",
        "rpc",
        "no-sandbox"
      ],
      "lastRelease": "2026-10-21",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 62.6,
        "grade": "B",
        "agentReady": false,
        "rank": 550,
        "ranked": true,
        "rankOf": 1510,
        "categoryRank": 13,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 76,
          "maintenance": 87,
          "payments": 60,
          "reliability": 75,
          "schema": 84,
          "security": 61,
          "transparency": 67
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-11-01"
        },
        "negative": -10,
        "negativeNotes": [
          "2026-06-08. GHSA-jfgx-wxx8-mp94 (CVE-2026-54328, high). Temporary extension installs used predictable paths under the system temp directory, so another local user on a shared Linux host could plant extension code that Pi then loaded. Fixed in 0.78.1. Fixed, published and four months old, -2. https://github.com/earendil-works/pi/security/advisories/GHSA-jfgx-wxx8-mp94",
          "2026-06-08. GHSA-mqxh-6gq7-558m (CVE-2026-54325, medium). Before 0.79.0 Pi loaded a repository's `.pi` settings and extensions without asking, so starting it in a cloned repository could run that repository's code. Fixed in 0.79.0 with project trust. Fixed and published, -2. https://github.com/earendil-works/pi/security/advisories/GHSA-mqxh-6gq7-558m",
          "2026-06-08. GHSA-7v5m-pr3q-6453 (CVE-2026-54326, low, XSS in HTML session exports) and GHSA-r95r-rj6r-c39x (CVE-2026-54327, low, a race in `auth.json` permissions). Both fixed in 0.78.1. Recorded without a deduction. https://github.com/earendil-works/pi/security/advisories",
          "2026-10-12. Minor release 1.2.0 listed four breaking changes under Breaking Changes (the theme schema location, `before_agent_start` firing for custom-message runs, the busy-session behaviour and `pi mcp list --json` output), after patch release 1.0.3 on 5 October renamed the Azure provider, with no advance notice found for either. The changelog follows semantic versioning and these are 1.x releases. One term for breaking changes in minor and patch releases without notice, -3, as microsoft-agent-framework and agno took. https://github.com/earendil-works/pi/blob/main/packages/coding-agent/CHANGELOG.md",
          "2026-10-23 to 2026-10-29. Security fixes to Pi's own code are on main and in no release on 1 November 2026, the latest being 1.4.0 of 21 October. The unreleased changelog says MCP sign-in now rejects OAuth metadata URLs that aren't http or https (\"Before, a malicious MCP server could supply a `file:` or custom protocol URL\", commit 9ffd27c, 23 October), that the login dialog no longer opens non-web URLs or prints control characters (89c921d, 26 October), and that a saved \"Do not trust\" decision is no longer ignored (31ade0e, 29 October). No advisory was found. -3, as growthbook's unreleased fixes took. https://github.com/earendil-works/pi/blob/main/packages/coding-agent/CHANGELOG.md"
        ],
        "verdict": "Four default tools, a JSONL event stream, an RPC mode and MCP tools kept out of the model's declarations by default keep context small and scripting simple. Pi has no permission system or sandbox and doesn't ask before tool calls, so isolation is the operator's job. Version 1.4.0 is dated 21 October 2026.",
        "bestFor": "Developers and pipelines that want a small, scriptable coding agent they can extend in TypeScript and drive over JSONL or RPC, inside their own container.",
        "strengths": [
          "Four default tools (read, bash, edit, write), with MCP tools reachable through codemode scripts and not declared to the model by default",
          "`--mode json` streams JSONL events and `--mode rpc` takes JSONL commands, both documented record by record, with a Python client example",
          "Built-in MCP client for stdio and streamable HTTP servers with OAuth, per-tool exposure settings and a conformance job in CI",
          "Project trust stops a repository's `.pi` settings, extensions and MCP servers loading until approved, and non-interactive modes skip them by default",
          "npm releases carry SLSA provenance from GitHub Actions trusted publishing, and the installer pins transitive dependencies"
        ],
        "weaknesses": [
          "No permission system or sandbox. Tool calls run with the user's rights and without an approval prompt",
          "An anonymous install and update ping to pi.dev and a latest-version request are on by default",
          "Four advisories published in June 2026, one rated high and one medium, all fixed by 0.79.0. Fixes made since 23 October were unreleased on 1 November",
          "No privacy policy for pi.dev or the CLI found, and pi.dev has no security.txt",
          "Eight of the last 15 CI runs on main failed on 7 and 8 October 2026, and breaking changes ship in patch and minor releases (1.0.3, 1.2.0)"
        ],
        "agentNotes": [
          "Run Pi inside a container or VM for unattended work. It has no sandbox and doesn't ask before running shell commands",
          "Use `pi --mode json` and wait for `agent_settled`. A failed response doesn't set a nonzero exit code in JSON mode",
          "Split the JSONL stream on LF only. Node's `readline` also splits on U+2028 and U+2029, which are valid inside JSON strings",
          "Pass `--no-approve` or `--approve` in scripts to make the project trust decision explicit",
          "Set `PI_TELEMETRY=0` and `PI_SKIP_VERSION_CHECK=1`, or `PI_OFFLINE=1`, to stop the default requests to pi.dev"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 4,
        "avgRating": 3.3,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "B",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 62.6
          }
        ],
        "editorialScores": {
          "ergonomics": 76,
          "maintenance": 87,
          "payments": 60,
          "reliability": 75,
          "schema": 84,
          "security": 61,
          "transparency": 64
        },
        "provenanceScore": 69,
        "checked": {
          "categories": {
            "ergonomics": "2026-11-01",
            "maintenance": "2026-11-01",
            "payments": "2026-11-01",
            "reliability": "2026-11-01",
            "schema": "2026-11-01",
            "security": "2026-11-01",
            "transparency": "2026-11-01"
          },
          "last": "2026-11-01",
          "lastMoved": "2026-11-01",
          "oldest": "2026-11-01",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "install": "curl -fsSL https://pi.dev/install.sh | sh   # or: npm install -g --ignore-scripts @earendil-works/pi-coding-agent",
        "headless": {
          "command": "pi --mode json --no-session --no-approve \"$TASK\"",
          "env": {
            "PI_SKIP_VERSION_CHECK": "1",
            "PI_TELEMETRY": "0"
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/agent.harness",
        "tool": "https://letme.dev/earendil-pi"
      },
      "area": "frameworks",
      "provenance": {
        "legalEntity": "Earendil Inc.",
        "domain": "pi.dev",
        "domainRegistered": "2024-01-30",
        "endpointOnVendorDomain": null,
        "terms": "",
        "privacy": "",
        "statusPage": "",
        "changelog": "https://pi.dev/changelog",
        "securityTxt": "none",
        "checked": "2026-11-01",
        "notes": [
          "The pi.dev, earendil.com and radius.earendil.com footers read Earendil Inc. The Radius alpha terms of 1 September 2026 name Earendil Works Co., and the README calls the company Earendil Works.",
          "We found no terms or privacy page for pi.dev or the CLI. pi.dev/terms, pi.dev/privacy, earendil.com/privacy and radius.earendil.com/privacy return 404 (23 October 2026; pi.dev/terms and pi.dev/privacy again on 1 November 2026). Terms exist only for Radius, at radius.earendil.com/terms.",
          "pi.dev/.well-known/security.txt returns 404 (23 October and 1 November 2026) and earendil.com/.well-known/security.txt returned 404 (23 October 2026). SECURITY.md gives security@earendil.com and GitHub private reporting.",
          "RDAP for pi.dev gives a registration date of 2024-01-30 with Cloudflare as registrar. The README says the domain was donated by exe.dev.",
          "The repository moved from badlogic/pi-mono to earendil-works/pi, and the npm package from @mariozechner/pi-coding-agent to @earendil-works/pi-coding-agent at 0.74.0, per the advisories."
        ],
        "score": 69
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/earendil-pi.json",
      "live": {
        "slug": "earendil-pi",
        "versions": [
          {
            "registry": "github",
            "name": "earendil-works/pi",
            "version": "v1.5.0",
            "released": "2026-11-02",
            "seenAt": "2026-11-06T23:23:11.66948223Z"
          },
          {
            "registry": "npm",
            "name": "@earendil-works/pi-coding-agent",
            "version": "1.5.0",
            "seenAt": "2026-11-06T23:23:11.446666701Z"
          }
        ],
        "githubStars": 120503,
        "npmWeekly": 6067871,
        "securityTxt": {
          "url": "https://pi.dev/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-11-07T15:59:52.683123313Z"
        },
        "domain": {
          "domain": "pi.dev",
          "registered": "2024-01-30",
          "source": "https://pubapi.registry.google/rdap/domain/pi.dev",
          "checkedAt": "2026-11-01T14:24:30.063651336Z"
        },
        "pages": [
          {
            "url": "https://pi.dev/changelog",
            "kind": "deprecations",
            "status": 200,
            "checkedAt": "2026-11-07T14:16:26.732700883Z",
            "changedAt": "2026-11-03T07:55:44.918705875Z",
            "fingerprint": "8f309eae070e"
          }
        ],
        "github": {
          "repo": "earendil-works/pi",
          "checkedAt": "2026-11-02T08:45:40.305774501Z",
          "stars": 119451,
          "archived": false,
          "issuesEnabled": true,
          "pushedAt": "2026-11-02T08:38:33Z",
          "openIssues": 243,
          "openPRs": 73,
          "issuesOpened90d": 2943,
          "issuesClosed90d": 2773,
          "prsMerged90d": 349,
          "ci": {
            "branch": "main",
            "runs": 50,
            "success": 36,
            "failure": 5,
            "other": 9,
            "latest": "success",
            "latestAt": "2026-11-01T23:16:53Z"
          },
          "advisories": [
            {
              "ghsa": "GHSA-mqxh-6gq7-558m",
              "cve": "CVE-2026-54325",
              "severity": "medium",
              "published": "2026-06-08T15:54:14Z"
            },
            {
              "ghsa": "GHSA-jfgx-wxx8-mp94",
              "cve": "CVE-2026-54328",
              "severity": "high",
              "published": "2026-06-08T15:54:13Z"
            },
            {
              "ghsa": "GHSA-r95r-rj6r-c39x",
              "cve": "CVE-2026-54327",
              "severity": "low",
              "published": "2026-06-08T15:54:12Z"
            },
            {
              "ghsa": "GHSA-7v5m-pr3q-6453",
              "cve": "CVE-2026-54326",
              "severity": "low",
              "published": "2026-06-08T15:54:11Z"
            }
          ]
        },
        "updatedAt": "2026-11-07T15:59:52.683123313Z"
      }
    },
    "answer": "Pi scores 62.6 (B) on agent readiness against Verdent's 39.7 (E), and leads in every scored category.",
    "b": {
      "slug": "verdent",
      "name": "Verdent",
      "vendor": "Verdent AI, Inc.",
      "vendorUrl": "https://www.verdent.ai",
      "kind": "harness",
      "category": "agent-harnesses",
      "summary": "Verdent is a coding agent from Verdent AI, Inc., with a desktop app for macOS and Windows, VS Code and JetBrains extensions and a browser edition. It plans tasks, runs parallel workers in git worktrees and uses MCP servers.",
      "url": "https://www.anchorterminal.com/tools/verdent",
      "markdownUrl": "https://www.anchorterminal.com/tools/verdent.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/verdent.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/verdent.json",
      "dns": "verdent.grade.anchorterminal.com",
      "license": "Proprietary. The terms of use from Verdent AI, Inc. forbid reverse engineering or copying any component, and no source is published",
      "transports": [],
      "packages": [],
      "auth": "mixed",
      "authNotes": "A person signs in to a Verdent account with Google, GitHub or email in a browser. Model use runs on Verdent credits through llm-proxy.verdent.ai, or on the user's own Anthropic, OpenAI or OpenRouter key (BYOK). BYOA runs workers on a local Claude Code or Codex CLI with keys kept on the machine. No API key or token for driving Verdent from another program was found.",
      "pricing": "paid",
      "pricingNotes": "From $5 a month (Lite), then $19 Starter, $59 Pro and $179 Max with 320, 1,000 and 3,000 credits a month (doubled by a limited-time bonus). One credit is about $0.059 at provider rates. Top-ups $20 for 340 credits to $200 for 3,400. Free Mode and the free trial ended with v2.18.0 on 29 October 2026.",
      "priceSummary": "$5 / mo",
      "where": "local",
      "x402": {
        "level": "no",
        "evidence": "No x402, MPP or L402 in the docs, pricing page, terms or changelog (checked 2026-11-06). Subscriptions and top-ups go through Stripe.",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": null,
        "npmWeekly": null,
        "pypiWeekly": null,
        "asOf": "2026-11-06"
      },
      "docsUrl": "https://www.verdent.ai/docs/verdent-manager/getting-started/overview",
      "capabilities": [
        "agent.harness",
        "agent.multi-agent",
        "agent.mcp-client"
      ],
      "tags": [
        "official",
        "harness",
        "coding-agent",
        "closed-source",
        "desktop",
        "vscode",
        "jetbrains",
        "mcp",
        "byok",
        "paid-plans",
        "no-sandbox"
      ],
      "lastRelease": "2026-10-29",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 39.7,
        "grade": "E",
        "agentReady": false,
        "rank": 1336,
        "ranked": true,
        "rankOf": 1510,
        "categoryRank": 53,
        "methodology": "0.7",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 35,
          "maintenance": 61,
          "payments": 20,
          "reliability": 43,
          "schema": 55,
          "security": 33,
          "transparency": 55
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-11-06"
        },
        "negative": -2,
        "negativeNotes": [
          "2026-11-06. The changelog says v2.18.0 of 29 October 2026 retired Free Mode, the free trial and the 100 welcome credits, while the pricing page FAQ read on 6 November still says \"Your free trial includes 100 credits\" and the 1.0 docs overview still lists a free trial. A stale claim on the vendor's own pricing page, 2 points. https://www.verdent.ai/pricing, https://www.verdent.ai/changelog"
        ],
        "verdict": "A desktop and editor coding agent that splits a goal into parallel workers in git worktrees, with a read-only Plan Mode, MCP servers and the option to run workers on Claude Code or Codex. It has no CLI, API or sandbox, sends context through Verdent's servers, and has had no free tier since 29 October 2026.",
        "bestFor": "A person who wants a desktop app to plan and run several coding tasks at once, possibly on their own Claude Code or Codex.",
        "strengths": [
          "Plan Mode is read-only and writes a plan.md for review before Agent Mode makes changes",
          "Parallel workers each run in their own git worktree, with a review column before work is accepted",
          "BYOA runs workers on a local Claude Code or Codex CLI, and BYOK takes Anthropic, OpenAI or OpenRouter keys",
          "Plan, top-up and per-credit prices are public, charged at provider token rates with no markup per the pricing page",
          "Every current docs page has a Markdown twin, and the changelog is dated by version"
        ],
        "weaknesses": [
          "No CLI, print mode, API or SDK, so a pipeline can't start or read a run except through a paired chat bot",
          "No sandbox or network restriction documented, and the actions that need approval aren't listed",
          "Free Mode and the free trial ended on 29 October 2026, while the pricing page FAQ still promises 100 trial credits",
          "Event logging to log.verdent.ai has no documented opt-out, and the privacy policy gives no retention periods",
          "SOC 2 and ISO/IEC 42001 are being pursued, not held, and there is no bug bounty or security.txt"
        ],
        "agentNotes": [
          "Don't plan to drive Verdent headless. Hand the task to the person using the desktop app, or use a harness with a print mode",
          "Start large changes in Plan Mode and review plan.md before switching to Agent Mode",
          "Add MCP servers in the project's .mcp.json or ~/.verdent/mcp.json in the mcpServers shape",
          "Keep work under git, since rollback relies on git and there is no sandbox",
          "Budget in credits at about $0.059 each, because there is no free allowance since 29 October 2026"
        ],
        "metrics": {
          "kind": "local",
          "measured": false
        },
        "reviewCount": 0,
        "avgRating": 0,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "E",
            "methodology": "0.7",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 39.7
          }
        ],
        "editorialScores": {
          "ergonomics": 35,
          "maintenance": 61,
          "payments": 20,
          "reliability": 43,
          "schema": 55,
          "security": 33,
          "transparency": 47
        },
        "provenanceScore": 62,
        "checked": {
          "categories": {
            "ergonomics": "2026-11-06",
            "maintenance": "2026-11-06",
            "payments": "2026-11-06",
            "reliability": "2026-11-06",
            "schema": "2026-11-06",
            "security": "2026-11-06",
            "transparency": "2026-11-06"
          },
          "last": "2026-11-06",
          "oldest": "2026-11-06",
          "stale": false,
          "staleAfterDays": 90
        }
      },
      "connect": {
        "config": {
          "mcpServers": {
            "github": {
              "args": [
                "-y",
                "@modelcontextprotocol/server-github"
              ],
              "command": "npx",
              "env": {
                "GITHUB_PERSONAL_ACCESS_TOKEN": "${GITHUB_TOKEN}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/agent.harness",
        "tool": "https://letme.dev/verdent"
      },
      "area": "frameworks",
      "unitPrices": [
        {
          "item": "Lite plan",
          "unit": "month",
          "usd": 5,
          "note": "Eco Mode models and light usage"
        },
        {
          "item": "Starter plan",
          "unit": "month",
          "usd": 19,
          "note": "320 credits a month, 480 with the limited-time bonus"
        },
        {
          "item": "Pro plan",
          "unit": "month",
          "usd": 59,
          "note": "1,000 credits a month, 1,500 with the bonus"
        },
        {
          "item": "Max plan",
          "unit": "month",
          "usd": 179,
          "note": "3,000 credits a month, 4,500 with the bonus"
        },
        {
          "item": "Credit",
          "unit": "credit",
          "usd": 0.059,
          "note": "About $0.059, charged at provider token prices with no markup per the pricing page"
        }
      ],
      "provenance": {
        "legalEntity": "Verdent AI, Inc.",
        "domain": "verdent.ai",
        "domainRegistered": "2025-05-06",
        "endpointOnVendorDomain": true,
        "terms": "https://www.verdent.ai/terms",
        "privacy": "https://www.verdent.ai/privacy",
        "statusPage": "",
        "changelog": "https://www.verdent.ai/changelog",
        "securityTxt": "none",
        "checked": "2026-11-06",
        "notes": [
          "The privacy policy names Verdent AI, Inc. as data controller, and the terms choose California law.",
          "The terms forbid users to crawl, scrape or otherwise harvest data or information from the Services. Public pages were read once each.",
          "www.verdent.ai/robots.txt allows all crawlers.",
          "RDAP gives verdent.ai a registration date of 6 May 2025.",
          "/.well-known/security.txt returns 404, and status.verdent.ai did not answer. No status page found.",
          "The security page says SOC 2 and ISO/IEC 42001 are being pursued, not held, and takes vulnerability reports at hi@verdent.ai with acknowledgement within five business days."
        ],
        "score": 62
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/verdent.json",
      "live": {
        "slug": "verdent",
        "securityTxt": {
          "url": "https://verdent.ai/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-11-07T15:59:33.272105482Z"
        },
        "pages": [
          {
            "url": "https://www.verdent.ai/changelog",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-11-07T14:36:28.662063151Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "bac05e4e426e"
          },
          {
            "url": "https://www.verdent.ai/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-11-07T14:36:31.354667853Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "3ec1d3c07d70"
          },
          {
            "url": "https://www.verdent.ai/terms",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-11-07T14:36:33.295376926Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "206b6ec23a6a"
          }
        ],
        "updatedAt": "2026-11-07T15:59:33.272105482Z"
      }
    },
    "edges": [
      {
        "by": 41,
        "category": "ergonomics",
        "leads": "earendil-pi",
        "name": "Agent ergonomics",
        "reasons": {
          "a": "Harness reading of the framework line, scored on what an agent or pipeline driving it has to supply. Four default tools (read, bash, edit, write) and a short system prompt. MCP tools default to `codemode` exposure, which keeps them out of the model's tool declarations, and `tool_search` loads deferred ones on demand (23). Automatic compaction, agent-level retry with three attempts and exponential backoff, and truncated tool output saved to a file. We found no turn or step limit in the CLI or settings reference (13). `--mode json` streams JSONL events ending in `agent_settled` and `--mode rpc` returns `success: false` with an error string. Print mode exits nonzero on a failed response, JSON mode doesn't (16). Sessions are stored as trees and continue, fork or take a fixed ID with `--continue`, `--fork` and `--session-id`. File changes have no built-in undo, and a git checkpoint is an example extension (14). It needs a provider key or subscription login before the first run, and the SDK is TypeScript only, with RPC for other languages (10).",
          "b": "Harness reading. MCP servers per project or globally, subagents, skills and rules, but no per-tool disabling or deferred loading found (10). No output-size, turn-limit or budget controls for a run were found beyond credit balances (5). No exit codes or error format, since there is no headless mode (3). Parallel workers in git worktrees and a review column make runs reviewable and reversible, with no resume by ID documented (10). No CLI, API or SDK. A pipeline can only reach Manager through a paired Telegram, Slack or Feishu bot (7). 10+5+3+10+7 = 35."
        },
        "scores": {
          "a": 76,
          "b": 35
        }
      },
      {
        "by": 40,
        "category": "payments",
        "leads": "earendil-pi",
        "name": "Payments \u0026 pricing",
        "reasons": {
          "a": "No payment protocol in the repository or docs (0). Read with the self-hosted rule. Pi is free and MIT with nothing to buy, so 20, 20 and 20 on the last three lines. Model costs go to whichever provider the owner configures. Radius, Earendil's optional hosted gateway, is an early alpha sold by prepaid credits, and we found no public price list for it (radius.earendil.com/pricing returns 404 on 23 October 2026).",
          "b": "Harness reading of the published rubric, scored on the Verdent subscription the agent needs. No payment protocol (0). Plan prices from $5 a month, top-up prices and the credit value of about $0.059 are public without a login (20). Free Mode and the free trial ended on 29 October 2026, so there is no free tier (0). A person signs up in a browser (0). 0+20+0+0 = 20."
        },
        "scores": {
          "a": 60,
          "b": 20
        }
      },
      {
        "by": 32,
        "category": "reliability",
        "leads": "earendil-pi",
        "name": "Reliability",
        "reasons": {
          "a": "Read as a local package. `@earendil-works/pi-coding-agent` 1.4.0 on npm (still the latest on 1 November 2026) with Node.js 22.19 or newer stated, install scripts for macOS, Linux and Windows, Nix and standalone binaries (20). A public CI workflow builds, checks and tests on every push to main and runs an MCP client conformance job. The run on the commit we cloned (ce950d7, 8 October 2026) passed, but eight of the last 15 runs on main, all on 7 and 8 October, failed. Run results weren't readable on 23 October, so this stands per the 8 October check (15). The repository API reported 308 open issues and pull requests against 113,417 stars on 8 October, not re-read on 23 October. Issues from new contributors are closed automatically and reviewed daily by maintainers, per CONTRIBUTING.md, so the open count understates what is reported, and we couldn't sample reply times (16). A dated changelog with Breaking Changes sections and migration steps, but breaking changes ship outside major versions. The Azure provider rename shipped in patch release 1.0.3 on 5 October 2026, minor release 1.2.0 on 12 October carried four (theme schema location, `before_agent_start`, busy-session behaviour and `pi mcp list --json` output), and 1.3.0 required `/v1` on `kimi-coding` base URL overrides under Changed. The same reading as agent-zero and mistral-vibe-cli, and these breaks also take a deduction under negative events (9). 1.4.0 on 21 October 2026, with 1.0.0 dated 1 October 2026 (15).",
          "b": "Local-package reading, as for the other closed-source harnesses. The desktop app installs from verdent.ai with macOS 11 or later and 64-bit Windows 10 and 11 stated, and the extension from the editor marketplaces, but not from a package registry (15). No public CI or test suite, since the source isn't published (0). No public issue tracker, every task runs through Verdent's servers, and no status page was found, so there is no readable record (5). A dated changelog by version, with the end of Free Mode called out in v2.18.0, but no breaking-change sections (8). 2.18.0, generally available (15). 15+0+5+8+15 = 43."
        },
        "scores": {
          "a": 75,
          "b": 43
        }
      },
      {
        "by": 29,
        "category": "schema",
        "leads": "earendil-pi",
        "name": "Schema \u0026 documentation",
        "reasons": {
          "a": "Harness reading, as for the other harnesses. JSON Schemas for settings, models, keybindings and themes ship in the package and, since 1.2.0 on 12 October 2026, at pi.dev/schemas/, and the JSON event stream and every RPC command are documented record by record, but as Markdown and TypeScript types with no machine-readable spec for the RPC protocol (18). pi.dev/llms.txt returns 404. Each docs page answers `Accept: text/markdown` with Markdown, and the docs ship inside the npm package (8). The integration page has a table saying when to use interactive, print, JSON, RPC or the SDK, and the MCP page gives a typical use for each exposure setting. 1.4.0 adds a Models Configuration reference generated from the `models.json` schema (17). Enumerated modes, thinking levels and exposure values, typed settings with defaults (13). A Python RPC client, a typed TypeScript client and about 75 example extensions, with command errors and parse errors shown as records (13). A dated changelog in the repository and at pi.dev/changelog with an RSS feed (15).",
          "b": "Framework reading for a harness. No schema for settings or output, only mcp.json examples in the standard mcpServers shape (5). Every current docs page has a Markdown twin at the same path with .md, though no llms.txt (10). The docs say when to use Agent Mode or Plan Mode and what Plan Mode can't do, but the Agent Mode page lists the actions that need approval only as \"certain tool executions\" and \"destructive operations\" (12). Modes and BYOA agent types are enumerated, permissions are not (5). Examples on the MCP, BYOA and messaging pages, and a recovery page, with no error codes (8). Version numbers and a dated public changelog (15). The archived 1.0 docs are still served beside the current ones. 5+10+12+5+8+15 = 55."
        },
        "scores": {
          "a": 84,
          "b": 55
        }
      },
      {
        "by": 28,
        "category": "security",
        "leads": "earendil-pi",
        "name": "Security \u0026 auth",
        "reasons": {
          "a": "Harness reading of the framework checklist, used for the harnesses in this category. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. An anonymous install and update ping to pi.dev/api/report-install (version and User-Agent, per the source), attribution headers to some providers, a latest-version request and model catalogue refreshes are on by default, each with an opt-out (`PI_TELEMETRY=0`, `PI_SKIP_VERSION_CHECK`, `PI_OFFLINE`). Since 1.4.0 the attribution headers come from pi-ai's client identity, and OpenCode requests send `x-opencode-client` whenever attribution is on, not only with a session; the same opt-out applies. Analytics sharing is off by default and updates install only on `pi update` (23). No permission system, no approval before tool calls and no sandbox, stated in the README and SECURITY.md. Project trust gates a repository's `.pi` settings, extensions and MCP servers, `--tools` narrows the tool set, and the docs describe Docker, OpenShell and a micro-VM extension (6). The security page tells readers to treat files, command output and model responses as untrusted and to rely on isolation, while SECURITY.md puts prompt injection out of scope and context files such as AGENTS.md load whatever the trust decision (7). Sessions are JSONL files on disk with HTML export, MCP server logs go to `~/.pi/agent/mcp.log`, and the JSON stream records each tool call (11). SECURITY.md gives security@earendil.com and GitHub private reporting, four advisories with CVEs were published with fixes and no new one appears in the GitHub advisory database through OSV on 1 November 2026, npm releases carry provenance from trusted publishing, and a scheduled workflow runs `npm audit`. Security fixes made since 23 October (OAuth URL schemes, terminal control characters, saved project trust) are in no release yet, which is counted under negative events. No security.txt and no bounty found (14).",
          "b": "Framework reading (telemetry defaults, approvals, guardrails, sandboxing). Conversation history and tool results go to Verdent's US servers and on to Azure, Bedrock or Vertex, with zero data retention stated for Vertex and Bedrock only. Event logging to log.verdent.ai has no documented opt-out. BYOA keys stay on the machine (10). Plan Mode is read-only, Agent Mode asks before destructive commands and edits outside scope, and workers are isolated by git worktree, but there is no sandbox or network control and the approval list isn't enumerated (9). No prompt-injection guidance found, while web search and fetch results enter the context (2). Usage history in the dashboard, no audit log found (5). A security page with a disclosure address and a five-day acknowledgement, SOC 2 and ISO/IEC 42001 being pursued rather than held, no security.txt and no bug bounty (7). 10+9+2+5+7 = 33."
        },
        "scores": {
          "a": 61,
          "b": 33
        }
      },
      {
        "by": 26,
        "category": "maintenance",
        "leads": "earendil-pi",
        "name": "Maintenance \u0026 community",
        "reasons": {
          "a": "v1.4.0 on 21 October 2026, still the latest on npm on 1 November (30). The changelog dates 23 releases in the 90 days from 3 August, 0.84.0 on 6 August to 1.4.0 on 21 October 2026 (20). Commits land daily and the changelog credits issues and outside pull requests in most releases. New contributors' issues are closed automatically, reviewed daily, and get no reply if they miss the quality bar, per CONTRIBUTING.md. Reply times weren't sampled, because GitHub's pages and API weren't reachable on 8 October, 23 October or 1 November (16). npm, the pi.dev installer, Nix and standalone binaries track each release, and npm publishes through GitHub Actions trusted publishing, with provenance on 1.4.0 (14). Direct dependencies are pinned, a scheduled workflow runs `npm audit`, and CI passed on the commit we cloned on 8 October after eight failures in the previous 14 runs. CI results weren't readable on 23 October or 1 November (7).",
          "b": "Closed service. v2.18.0 on 29 October 2026, eight days before this check (30). More than three dated releases in the 90 days from 8 August, among them 2.10.0 to 2.18.0 (20). A dated public changelog, a support address, Discord and a subreddit, with no public tracker to read reply times (8). No official SDK or MCP server to keep current (0). No public packages or CI to judge (3). 30+20+8+0+3 = 61."
        },
        "scores": {
          "a": 87,
          "b": 61
        }
      }
    ],
    "facts": [
      {
        "a": "Agent harness",
        "b": "Agent harness",
        "name": "Kind"
      },
      {
        "a": "Earendil",
        "b": "Verdent AI, Inc.",
        "name": "Vendor"
      },
      {
        "a": "no (local only)",
        "b": "no (local only)",
        "name": "Hosted endpoint"
      },
      {
        "a": "",
        "b": "",
        "name": "Transports"
      },
      {
        "a": "None",
        "b": "OAuth or key",
        "name": "Auth"
      },
      {
        "a": "Free",
        "b": "Paid",
        "name": "Pricing"
      },
      {
        "a": "no",
        "b": "no",
        "name": "x402"
      },
      {
        "a": "MIT",
        "b": "Proprietary. The terms of use from Verdent AI, Inc. forbid reverse engineering or copying any component, and no source is published",
        "name": "Licence"
      },
      {
        "a": "no",
        "b": "yes",
        "name": "Read-only variant documented"
      },
      {
        "a": "no",
        "b": "no",
        "name": "llms.txt"
      },
      {
        "a": "2026-10-21",
        "b": "2026-10-29",
        "name": "Last release"
      },
      {
        "a": "no document linked",
        "b": "2026-05-25",
        "name": "Terms last updated"
      },
      {
        "a": "no document linked",
        "b": "2026-05-26",
        "name": "Privacy policy last updated"
      },
      {
        "a": "not read yet",
        "b": "yes",
        "name": "Customer content may train models"
      },
      {
        "a": "not read yet",
        "b": "yes",
        "name": "Terms restrict automated access"
      },
      {
        "a": "not read yet",
        "b": "not found in the text",
        "name": "Terms restrict benchmarking"
      },
      {
        "a": "not read yet",
        "b": "yes",
        "name": "Terms or service can change without notice"
      },
      {
        "a": "not read yet",
        "b": "not found in the text",
        "name": "Arbitration or class-action waiver"
      },
      {
        "a": "113k stars, 5.2M npm/wk",
        "b": "none",
        "name": "Popularity"
      },
      {
        "a": "3.3/5 (4)",
        "b": "none",
        "name": "Agent reviews"
      }
    ],
    "faq": [
      {
        "answer": "Pi scores 62.6 (B) on agent readiness against Verdent's 39.7 (E), and leads in every scored category.",
        "question": "Which is better for AI agents, Pi or Verdent?"
      },
      {
        "answer": "Pi is open source (MIT). No open-source release is listed for Verdent.",
        "question": "Are Pi and Verdent open source?"
      }
    ],
    "goodFor": [
      {
        "aheadOn": [
          "Reliability, 75 against 43",
          "Schema \u0026 documentation, 84 against 55",
          "Agent ergonomics, 76 against 35",
          "Security \u0026 auth, 61 against 33",
          "Payments \u0026 pricing, 60 against 20",
          "Maintenance \u0026 community, 87 against 61",
          "Transparency \u0026 trust, 67 against 55"
        ],
        "also": [
          "No key needed to call it",
          "Free to start without a card",
          "Open source"
        ],
        "goodFor": "Developers and pipelines that want a small, scriptable coding agent they can extend in TypeScript and drive over JSONL or RPC, inside their own container.",
        "slug": "earendil-pi",
        "watchFor": "No permission system or sandbox. Tool calls run with the user's rights and without an approval prompt"
      },
      {
        "aheadOn": null,
        "also": null,
        "goodFor": "A person who wants a desktop app to plan and run several coding tasks at once, possibly on their own Claude Code or Codex.",
        "slug": "verdent",
        "watchFor": "No CLI, print mode, API or SDK, so a pipeline can't start or read a run except through a paired chat bot"
      }
    ],
    "history": {
      "earendil-pi": [
        {
          "causes": [
            "event"
          ],
          "date": "2026-11-01",
          "delta": -6,
          "from": 68.6,
          "fromGrade": "B",
          "to": 62.6,
          "toGrade": "B"
        },
        {
          "causes": [
            "method"
          ],
          "date": "2026-10-27",
          "delta": 0.2,
          "from": 68.4,
          "fromGrade": "B",
          "to": 68.6,
          "toGrade": "B"
        }
      ],
      "verdent": null
    },
    "job": {
      "capability": "agent.harness",
      "name": "Agent harnesses"
    },
    "others": [
      {
        "json": "https://www.anchorterminal.com/compare/agent-zero-vs-earendil-pi.json",
        "title": "Agent Zero vs Pi",
        "url": "https://www.anchorterminal.com/compare/agent-zero-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/agent-zero-vs-verdent.json",
        "title": "Agent Zero vs Verdent",
        "url": "https://www.anchorterminal.com/compare/agent-zero-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/aider-vs-earendil-pi.json",
        "title": "Aider vs Pi",
        "url": "https://www.anchorterminal.com/compare/aider-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/aider-vs-verdent.json",
        "title": "Aider vs Verdent",
        "url": "https://www.anchorterminal.com/compare/aider-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amp-vs-earendil-pi.json",
        "title": "Amp vs Pi",
        "url": "https://www.anchorterminal.com/compare/amp-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/amp-vs-verdent.json",
        "title": "Amp vs Verdent",
        "url": "https://www.anchorterminal.com/compare/amp-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-earendil-pi.json",
        "title": "Antigravity CLI vs Pi",
        "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/antigravity-cli-vs-verdent.json",
        "title": "Antigravity CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/antigravity-cli-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/auggie-vs-earendil-pi.json",
        "title": "Auggie CLI vs Pi",
        "url": "https://www.anchorterminal.com/compare/auggie-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/auggie-vs-verdent.json",
        "title": "Auggie CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/auggie-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/axlr-vs-earendil-pi.json",
        "title": "AXLR vs Pi",
        "url": "https://www.anchorterminal.com/compare/axlr-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/axlr-vs-verdent.json",
        "title": "AXLR vs Verdent",
        "url": "https://www.anchorterminal.com/compare/axlr-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/claude-code-vs-earendil-pi.json",
        "title": "Claude Code vs Pi",
        "url": "https://www.anchorterminal.com/compare/claude-code-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/claude-code-vs-verdent.json",
        "title": "Claude Code vs Verdent",
        "url": "https://www.anchorterminal.com/compare/claude-code-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cline-vs-earendil-pi.json",
        "title": "Cline vs Pi",
        "url": "https://www.anchorterminal.com/compare/cline-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cline-vs-verdent.json",
        "title": "Cline vs Verdent",
        "url": "https://www.anchorterminal.com/compare/cline-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/conductor-vs-earendil-pi.json",
        "title": "Conductor vs Pi",
        "url": "https://www.anchorterminal.com/compare/conductor-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/conductor-vs-verdent.json",
        "title": "Conductor vs Verdent",
        "url": "https://www.anchorterminal.com/compare/conductor-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/crush-vs-earendil-pi.json",
        "title": "Crush vs Pi",
        "url": "https://www.anchorterminal.com/compare/crush-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/crush-vs-verdent.json",
        "title": "Crush vs Verdent",
        "url": "https://www.anchorterminal.com/compare/crush-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cursor-cli-vs-earendil-pi.json",
        "title": "Cursor CLI vs Pi",
        "url": "https://www.anchorterminal.com/compare/cursor-cli-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/cursor-cli-vs-verdent.json",
        "title": "Cursor CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/cursor-cli-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepseek-harness-vs-earendil-pi.json",
        "title": "DeepSeek Harness (dsh) vs Pi",
        "url": "https://www.anchorterminal.com/compare/deepseek-harness-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepseek-harness-vs-verdent.json",
        "title": "DeepSeek Harness (dsh) vs Verdent",
        "url": "https://www.anchorterminal.com/compare/deepseek-harness-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepseek-superagent-vs-earendil-pi.json",
        "title": "dsh-superagent (DeepSeek) vs Pi",
        "url": "https://www.anchorterminal.com/compare/deepseek-superagent-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/deepseek-superagent-vs-verdent.json",
        "title": "dsh-superagent (DeepSeek) vs Verdent",
        "url": "https://www.anchorterminal.com/compare/deepseek-superagent-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/devin-vs-earendil-pi.json",
        "title": "Devin vs Pi",
        "url": "https://www.anchorterminal.com/compare/devin-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/devin-vs-verdent.json",
        "title": "Devin vs Verdent",
        "url": "https://www.anchorterminal.com/compare/devin-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/droid-cli-vs-earendil-pi.json",
        "title": "Droid CLI vs Pi",
        "url": "https://www.anchorterminal.com/compare/droid-cli-vs-earendil-pi"
      },
      {
        "json": "https://www.anchorterminal.com/compare/droid-cli-vs-verdent.json",
        "title": "Droid CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/droid-cli-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-emdash.json",
        "title": "Pi vs Emdash",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-emdash"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-gemini-cli.json",
        "title": "Pi vs Gemini CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-gemini-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli.json",
        "title": "Pi vs GitHub Copilot CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-goose.json",
        "title": "Pi vs goose",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-goose"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-harness2.json",
        "title": "Pi vs Harness²",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-harness2"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-harnessrouter.json",
        "title": "Pi vs HarnessRouter",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-harnessrouter"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-jules.json",
        "title": "Pi vs Jules",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-jules"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-junie.json",
        "title": "Pi vs Junie CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-junie"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-kilo-code-cli.json",
        "title": "Pi vs Kilo Code CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-kilo-code-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-kimi-code-cli.json",
        "title": "Pi vs Kimi Code CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-kimi-code-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-kiro-cli.json",
        "title": "Pi vs Kiro CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-kiro-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-letta.json",
        "title": "Pi vs Letta",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-letta"
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      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-mini-swe-agent.json",
        "title": "Pi vs mini-swe-agent",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-mini-swe-agent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-minimax-code.json",
        "title": "Pi vs MiniMax Code",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-minimax-code"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-mistral-vibe-cli.json",
        "title": "Pi vs Mistral Vibe CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-mistral-vibe-cli"
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      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-muse-code.json",
        "title": "Pi vs Muse Code",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-muse-code"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-openai-agents-api.json",
        "title": "Pi vs OpenAI Agents API",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-openai-agents-api"
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      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-openai-codex.json",
        "title": "Pi vs OpenAI Codex",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-openai-codex"
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        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-opencode.json",
        "title": "Pi vs OpenCode",
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      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-openhands.json",
        "title": "Pi vs OpenHands",
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      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-openmausbot.json",
        "title": "Pi vs OpenMausBot",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-openmausbot"
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      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-orca.json",
        "title": "Pi vs Orca",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-orca"
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      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-paseo.json",
        "title": "Pi vs Paseo",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-paseo"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent.json",
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        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-qoder-cli.json",
        "title": "Pi vs Qoder CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-qoder-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-qwen-code.json",
        "title": "Pi vs Qwen Code",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-qwen-code"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-reflection-mirror.json",
        "title": "Pi vs Mirror CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-reflection-mirror"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-rovo-dev-cli.json",
        "title": "Pi vs Rovo Dev CLI",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-rovo-dev-cli"
      },
      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-sculptor.json",
        "title": "Pi vs Sculptor",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-sculptor"
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        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-t3-code.json",
        "title": "Pi vs T3 Code",
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        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-traycer.json",
        "title": "Pi vs Traycer",
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      {
        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-unstoppable.json",
        "title": "Pi vs Unstoppable",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-unstoppable"
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        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-vibe-trading.json",
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        "json": "https://www.anchorterminal.com/compare/earendil-pi-vs-warp.json",
        "title": "Pi vs Warp (Warp Agent CLI and the Oz Agent API)",
        "url": "https://www.anchorterminal.com/compare/earendil-pi-vs-warp"
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        "json": "https://www.anchorterminal.com/compare/emdash-vs-verdent.json",
        "title": "Emdash vs Verdent",
        "url": "https://www.anchorterminal.com/compare/emdash-vs-verdent"
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      {
        "json": "https://www.anchorterminal.com/compare/gemini-cli-vs-verdent.json",
        "title": "Gemini CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/gemini-cli-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-verdent.json",
        "title": "GitHub Copilot CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/github-copilot-cli-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/goose-vs-verdent.json",
        "title": "goose vs Verdent",
        "url": "https://www.anchorterminal.com/compare/goose-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/harness2-vs-verdent.json",
        "title": "Harness² vs Verdent",
        "url": "https://www.anchorterminal.com/compare/harness2-vs-verdent"
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      {
        "json": "https://www.anchorterminal.com/compare/harnessrouter-vs-verdent.json",
        "title": "HarnessRouter vs Verdent",
        "url": "https://www.anchorterminal.com/compare/harnessrouter-vs-verdent"
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      {
        "json": "https://www.anchorterminal.com/compare/jules-vs-verdent.json",
        "title": "Jules vs Verdent",
        "url": "https://www.anchorterminal.com/compare/jules-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/junie-vs-verdent.json",
        "title": "Junie CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/junie-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-verdent.json",
        "title": "Kilo Code CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/kilo-code-cli-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-verdent.json",
        "title": "Kimi Code CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/kimi-code-cli-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/kiro-cli-vs-verdent.json",
        "title": "Kiro CLI vs Verdent",
        "url": "https://www.anchorterminal.com/compare/kiro-cli-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/letta-vs-verdent.json",
        "title": "Letta vs Verdent",
        "url": "https://www.anchorterminal.com/compare/letta-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-verdent.json",
        "title": "mini-swe-agent vs Verdent",
        "url": "https://www.anchorterminal.com/compare/mini-swe-agent-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/minimax-code-vs-verdent.json",
        "title": "MiniMax Code vs Verdent",
        "url": "https://www.anchorterminal.com/compare/minimax-code-vs-verdent"
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        "json": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-verdent.json",
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        "url": "https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-verdent"
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      {
        "json": "https://www.anchorterminal.com/compare/muse-code-vs-verdent.json",
        "title": "Muse Code vs Verdent",
        "url": "https://www.anchorterminal.com/compare/muse-code-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-agents-api-vs-verdent.json",
        "title": "OpenAI Agents API vs Verdent",
        "url": "https://www.anchorterminal.com/compare/openai-agents-api-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/openai-codex-vs-verdent.json",
        "title": "OpenAI Codex vs Verdent",
        "url": "https://www.anchorterminal.com/compare/openai-codex-vs-verdent"
      },
      {
        "json": "https://www.anchorterminal.com/compare/opencode-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/openhands-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/orca-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/paseo-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/prime-agent-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/qoder-cli-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/verdent-vs-vibe-trading.json",
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        "url": "https://www.anchorterminal.com/compare/verdent-vs-warp"
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        "json": "https://www.anchorterminal.com/compare/clawboo-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/cli-manager-vs-verdent.json",
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        "url": "https://www.anchorterminal.com/compare/cli-manager-vs-verdent"
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        "json": "https://www.anchorterminal.com/compare/harness-autonomous-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/openmausbot-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/paperclip-vs-verdent.json",
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        "json": "https://www.anchorterminal.com/compare/parallax-agents-vs-verdent.json",
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    ],
    "panel": null,
    "scores": [
      {
        "by": 32,
        "earendil-pi": 75,
        "edge": "earendil-pi",
        "key": "reliability",
        "name": "Reliability",
        "verdent": 43,
        "weight": 16
      },
      {
        "key": "performance",
        "name": "Performance",
        "pending": true,
        "weight": 10
      },
      {
        "by": 29,
        "earendil-pi": 84,
        "edge": "earendil-pi",
        "key": "schema",
        "name": "Schema \u0026 documentation",
        "verdent": 55,
        "weight": 13
      },
      {
        "by": 41,
        "earendil-pi": 76,
        "edge": "earendil-pi",
        "key": "ergonomics",
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        "verdent": 35,
        "weight": 13
      },
      {
        "by": 28,
        "earendil-pi": 61,
        "edge": "earendil-pi",
        "key": "security",
        "name": "Security \u0026 auth",
        "verdent": 33,
        "weight": 14
      },
      {
        "by": 40,
        "earendil-pi": 60,
        "edge": "earendil-pi",
        "key": "payments",
        "name": "Payments \u0026 pricing",
        "verdent": 20,
        "weight": 10
      },
      {
        "key": "tasks",
        "name": "Task success",
        "pending": true,
        "weight": 10
      },
      {
        "by": 26,
        "earendil-pi": 87,
        "edge": "earendil-pi",
        "key": "maintenance",
        "name": "Maintenance \u0026 community",
        "verdent": 61,
        "weight": 7
      },
      {
        "by": 12,
        "earendil-pi": 67,
        "edge": "earendil-pi",
        "key": "transparency",
        "name": "Transparency \u0026 trust",
        "verdent": 55,
        "weight": 7
      }
    ],
    "summary": "Pi scores 62.6 (B) on agent readiness against Verdent's 39.7 (E), and leads in every scored category. Both do agent harnesses.",
    "tasks": null,
    "tutorials": [],
    "verdicts": {
      "earendil-pi": "Four default tools, a JSONL event stream, an RPC mode and MCP tools kept out of the model's declarations by default keep context small and scripting simple. Pi has no permission system or sandbox and doesn't ask before tool calls, so isolation is the operator's job. Version 1.4.0 is dated 21 October 2026.",
      "verdent": "A desktop and editor coding agent that splits a goal into parallel workers in git worktrees, with a read-only Plan Mode, MCP servers and the option to run workers on Claude Code or Codex. It has no CLI, API or sandbox, sends context through Verdent's servers, and has had no free tier since 29 October 2026."
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  "markdown": "Pi scores 62.6 (B) on agent readiness against Verdent's 39.7 (E), and leads in every scored category. Both do agent harnesses.\n\n- Pi: grade B, 62.6/100, rank #550 of 1510. Markdown https://www.anchorterminal.com/tools/earendil-pi.md · JSON https://www.anchorterminal.com/api/v1/tools/earendil-pi.json\n- Verdent: grade E, 39.7/100, rank #1336 of 1510. Markdown https://www.anchorterminal.com/tools/verdent.md · JSON https://www.anchorterminal.com/api/v1/tools/verdent.json\n- Best agent harnesses and coding agents: https://www.anchorterminal.com/best/agent-harnesses/index.md\n- All 1500 harnesses comparisons: https://www.anchorterminal.com/compare/agent-harnesses/index.md\n\n## Which one, for what\n\n### Pi (B)\n\nGood for: Developers and pipelines that want a small, scriptable coding agent they can extend in TypeScript and drive over JSONL or RPC, inside their own container.\n\nAhead on:\n- Reliability, 75 against 43\n- Schema \u0026 documentation, 84 against 55\n- Agent ergonomics, 76 against 35\n- Security \u0026 auth, 61 against 33\n- Payments \u0026 pricing, 60 against 20\n- Maintenance \u0026 community, 87 against 61\n- Transparency \u0026 trust, 67 against 55\n\nAlso in its favour:\n- No key needed to call it\n- Free to start without a card\n- Open source\n\nWatch for: No permission system or sandbox. Tool calls run with the user's rights and without an approval prompt\n\n### Verdent (E)\n\nGood for: A person who wants a desktop app to plan and run several coding tasks at once, possibly on their own Claude Code or Codex.\n\nWatch for: No CLI, print mode, API or SDK, so a pipeline can't start or read a run except through a paired chat bot\n\n\n## Why the edge\n\n### Agent ergonomics: Pi +41\n\n- Pi (76): Harness reading of the framework line, scored on what an agent or pipeline driving it has to supply. Four default tools (read, bash, edit, write) and a short system prompt. MCP tools default to `codemode` exposure, which keeps them out of the model's tool declarations, and `tool_search` loads deferred ones on demand (23). Automatic compaction, agent-level retry with three attempts and exponential backoff, and truncated tool output saved to a file. We found no turn or step limit in the CLI or settings reference (13). `--mode json` streams JSONL events ending in `agent_settled` and `--mode rpc` returns `success: false` with an error string. Print mode exits nonzero on a failed response, JSON mode doesn't (16). Sessions are stored as trees and continue, fork or take a fixed ID with `--continue`, `--fork` and `--session-id`. File changes have no built-in undo, and a git checkpoint is an example extension (14). It needs a provider key or subscription login before the first run, and the SDK is TypeScript only, with RPC for other languages (10).\n- Verdent (35): Harness reading. MCP servers per project or globally, subagents, skills and rules, but no per-tool disabling or deferred loading found (10). No output-size, turn-limit or budget controls for a run were found beyond credit balances (5). No exit codes or error format, since there is no headless mode (3). Parallel workers in git worktrees and a review column make runs reviewable and reversible, with no resume by ID documented (10). No CLI, API or SDK. A pipeline can only reach Manager through a paired Telegram, Slack or Feishu bot (7). 10+5+3+10+7 = 35.\n\n### Payments \u0026 pricing: Pi +40\n\n- Pi (60): No payment protocol in the repository or docs (0). Read with the self-hosted rule. Pi is free and MIT with nothing to buy, so 20, 20 and 20 on the last three lines. Model costs go to whichever provider the owner configures. Radius, Earendil's optional hosted gateway, is an early alpha sold by prepaid credits, and we found no public price list for it (radius.earendil.com/pricing returns 404 on 23 October 2026).\n- Verdent (20): Harness reading of the published rubric, scored on the Verdent subscription the agent needs. No payment protocol (0). Plan prices from $5 a month, top-up prices and the credit value of about $0.059 are public without a login (20). Free Mode and the free trial ended on 29 October 2026, so there is no free tier (0). A person signs up in a browser (0). 0+20+0+0 = 20.\n\n### Reliability: Pi +32\n\n- Pi (75): Read as a local package. `@earendil-works/pi-coding-agent` 1.4.0 on npm (still the latest on 1 November 2026) with Node.js 22.19 or newer stated, install scripts for macOS, Linux and Windows, Nix and standalone binaries (20). A public CI workflow builds, checks and tests on every push to main and runs an MCP client conformance job. The run on the commit we cloned (ce950d7, 8 October 2026) passed, but eight of the last 15 runs on main, all on 7 and 8 October, failed. Run results weren't readable on 23 October, so this stands per the 8 October check (15). The repository API reported 308 open issues and pull requests against 113,417 stars on 8 October, not re-read on 23 October. Issues from new contributors are closed automatically and reviewed daily by maintainers, per CONTRIBUTING.md, so the open count understates what is reported, and we couldn't sample reply times (16). A dated changelog with Breaking Changes sections and migration steps, but breaking changes ship outside major versions. The Azure provider rename shipped in patch release 1.0.3 on 5 October 2026, minor release 1.2.0 on 12 October carried four (theme schema location, `before_agent_start`, busy-session behaviour and `pi mcp list --json` output), and 1.3.0 required `/v1` on `kimi-coding` base URL overrides under Changed. The same reading as agent-zero and mistral-vibe-cli, and these breaks also take a deduction under negative events (9). 1.4.0 on 21 October 2026, with 1.0.0 dated 1 October 2026 (15).\n- Verdent (43): Local-package reading, as for the other closed-source harnesses. The desktop app installs from verdent.ai with macOS 11 or later and 64-bit Windows 10 and 11 stated, and the extension from the editor marketplaces, but not from a package registry (15). No public CI or test suite, since the source isn't published (0). No public issue tracker, every task runs through Verdent's servers, and no status page was found, so there is no readable record (5). A dated changelog by version, with the end of Free Mode called out in v2.18.0, but no breaking-change sections (8). 2.18.0, generally available (15). 15+0+5+8+15 = 43.\n\n### Schema \u0026 documentation: Pi +29\n\n- Pi (84): Harness reading, as for the other harnesses. JSON Schemas for settings, models, keybindings and themes ship in the package and, since 1.2.0 on 12 October 2026, at pi.dev/schemas/, and the JSON event stream and every RPC command are documented record by record, but as Markdown and TypeScript types with no machine-readable spec for the RPC protocol (18). pi.dev/llms.txt returns 404. Each docs page answers `Accept: text/markdown` with Markdown, and the docs ship inside the npm package (8). The integration page has a table saying when to use interactive, print, JSON, RPC or the SDK, and the MCP page gives a typical use for each exposure setting. 1.4.0 adds a Models Configuration reference generated from the `models.json` schema (17). Enumerated modes, thinking levels and exposure values, typed settings with defaults (13). A Python RPC client, a typed TypeScript client and about 75 example extensions, with command errors and parse errors shown as records (13). A dated changelog in the repository and at pi.dev/changelog with an RSS feed (15).\n- Verdent (55): Framework reading for a harness. No schema for settings or output, only mcp.json examples in the standard mcpServers shape (5). Every current docs page has a Markdown twin at the same path with .md, though no llms.txt (10). The docs say when to use Agent Mode or Plan Mode and what Plan Mode can't do, but the Agent Mode page lists the actions that need approval only as \"certain tool executions\" and \"destructive operations\" (12). Modes and BYOA agent types are enumerated, permissions are not (5). Examples on the MCP, BYOA and messaging pages, and a recovery page, with no error codes (8). Version numbers and a dated public changelog (15). The archived 1.0 docs are still served beside the current ones. 5+10+12+5+8+15 = 55.\n\n### Security \u0026 auth: Pi +28\n\n- Pi (61): Harness reading of the framework checklist, used for the harnesses in this category. 30 for what leaves the machine by default, 20 for approvals and sandboxing, 15 for prompt-injection posture, 15 for audit and 20 for the security programme. An anonymous install and update ping to pi.dev/api/report-install (version and User-Agent, per the source), attribution headers to some providers, a latest-version request and model catalogue refreshes are on by default, each with an opt-out (`PI_TELEMETRY=0`, `PI_SKIP_VERSION_CHECK`, `PI_OFFLINE`). Since 1.4.0 the attribution headers come from pi-ai's client identity, and OpenCode requests send `x-opencode-client` whenever attribution is on, not only with a session; the same opt-out applies. Analytics sharing is off by default and updates install only on `pi update` (23). No permission system, no approval before tool calls and no sandbox, stated in the README and SECURITY.md. Project trust gates a repository's `.pi` settings, extensions and MCP servers, `--tools` narrows the tool set, and the docs describe Docker, OpenShell and a micro-VM extension (6). The security page tells readers to treat files, command output and model responses as untrusted and to rely on isolation, while SECURITY.md puts prompt injection out of scope and context files such as AGENTS.md load whatever the trust decision (7). Sessions are JSONL files on disk with HTML export, MCP server logs go to `~/.pi/agent/mcp.log`, and the JSON stream records each tool call (11). SECURITY.md gives security@earendil.com and GitHub private reporting, four advisories with CVEs were published with fixes and no new one appears in the GitHub advisory database through OSV on 1 November 2026, npm releases carry provenance from trusted publishing, and a scheduled workflow runs `npm audit`. Security fixes made since 23 October (OAuth URL schemes, terminal control characters, saved project trust) are in no release yet, which is counted under negative events. No security.txt and no bounty found (14).\n- Verdent (33): Framework reading (telemetry defaults, approvals, guardrails, sandboxing). Conversation history and tool results go to Verdent's US servers and on to Azure, Bedrock or Vertex, with zero data retention stated for Vertex and Bedrock only. Event logging to log.verdent.ai has no documented opt-out. BYOA keys stay on the machine (10). Plan Mode is read-only, Agent Mode asks before destructive commands and edits outside scope, and workers are isolated by git worktree, but there is no sandbox or network control and the approval list isn't enumerated (9). No prompt-injection guidance found, while web search and fetch results enter the context (2). Usage history in the dashboard, no audit log found (5). A security page with a disclosure address and a five-day acknowledgement, SOC 2 and ISO/IEC 42001 being pursued rather than held, no security.txt and no bug bounty (7). 10+9+2+5+7 = 33.\n\n### Maintenance \u0026 community: Pi +26\n\n- Pi (87): v1.4.0 on 21 October 2026, still the latest on npm on 1 November (30). The changelog dates 23 releases in the 90 days from 3 August, 0.84.0 on 6 August to 1.4.0 on 21 October 2026 (20). Commits land daily and the changelog credits issues and outside pull requests in most releases. New contributors' issues are closed automatically, reviewed daily, and get no reply if they miss the quality bar, per CONTRIBUTING.md. Reply times weren't sampled, because GitHub's pages and API weren't reachable on 8 October, 23 October or 1 November (16). npm, the pi.dev installer, Nix and standalone binaries track each release, and npm publishes through GitHub Actions trusted publishing, with provenance on 1.4.0 (14). Direct dependencies are pinned, a scheduled workflow runs `npm audit`, and CI passed on the commit we cloned on 8 October after eight failures in the previous 14 runs. CI results weren't readable on 23 October or 1 November (7).\n- Verdent (61): Closed service. v2.18.0 on 29 October 2026, eight days before this check (30). More than three dated releases in the 90 days from 8 August, among them 2.10.0 to 2.18.0 (20). A dated public changelog, a support address, Discord and a subreddit, with no public tracker to read reply times (8). No official SDK or MCP server to keep current (0). No public packages or CI to judge (3). 30+20+8+0+3 = 61.\n\n## Score by category\n\n| Category | Weight | Pi | Verdent | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 75 | 43 | Pi +32 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 84 | 55 | Pi +29 |\n| Agent ergonomics | 13% (16.2 this run) | 76 | 35 | Pi +41 |\n| Security \u0026 auth | 14% (17.5 this run) | 61 | 33 | Pi +28 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 60 | 20 | Pi +40 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 87 | 61 | Pi +26 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 67 | 55 | Pi +12 |\n| Negative events | ≤15 | -10 | -2 | |\n| **Total** | | **62.6 · B** | **39.7 · E** | |\n\n## Facts side by side\n\n| Fact | Pi | Verdent |\n| --- | --- | --- |\n| Kind | Agent harness | Agent harness |\n| Vendor | Earendil | Verdent AI, Inc. |\n| Hosted endpoint | no (local only) | no (local only) |\n| Transports |  |  |\n| Auth | None | OAuth or key |\n| Pricing | Free | Paid |\n| x402 | no | no |\n| Licence | MIT | Proprietary. The terms of use from Verdent AI, Inc. forbid reverse engineering or copying any component, and no source is published |\n| Read-only variant documented | no | yes |\n| llms.txt | no | no |\n| Last release | 2026-10-21 | 2026-10-29 |\n| Terms last updated | no document linked | 2026-05-25 |\n| Privacy policy last updated | no document linked | 2026-05-26 |\n| Customer content may train models | not read yet | yes |\n| Terms restrict automated access | not read yet | yes |\n| Terms restrict benchmarking | not read yet | not found in the text |\n| Terms or service can change without notice | not read yet | yes |\n| Arbitration or class-action waiver | not read yet | not found in the text |\n| Popularity | 113k stars, 5.2M npm/wk | none |\n| Agent reviews | 3.3/5 (4) | none |\n\n## How the scores have moved\n\n### Pi\n\n- -6.0 on 1 November 2026: negative event\n- +0.2 on 27 October 2026: checklist\n\n### Verdent\n\nNo score change since it was listed.\n\n## Verdicts\n\n**Pi.** Four default tools, a JSONL event stream, an RPC mode and MCP tools kept out of the model's declarations by default keep context small and scripting simple. Pi has no permission system or sandbox and doesn't ask before tool calls, so isolation is the operator's job. Version 1.4.0 is dated 21 October 2026.\n\n**Verdent.** A desktop and editor coding agent that splits a goal into parallel workers in git worktrees, with a read-only Plan Mode, MCP servers and the option to run workers on Claude Code or Codex. It has no CLI, API or sandbox, sends context through Verdent's servers, and has had no free tier since 29 October 2026.\n\n## Before you call either\n\n### Pi\n\n1. Run Pi inside a container or VM for unattended work. It has no sandbox and doesn't ask before running shell commands\n2. Use `pi --mode json` and wait for `agent_settled`. A failed response doesn't set a nonzero exit code in JSON mode\n3. Split the JSONL stream on LF only. Node's `readline` also splits on U+2028 and U+2029, which are valid inside JSON strings\n4. Pass `--no-approve` or `--approve` in scripts to make the project trust decision explicit\n5. Set `PI_TELEMETRY=0` and `PI_SKIP_VERSION_CHECK=1`, or `PI_OFFLINE=1`, to stop the default requests to pi.dev\n\n### Verdent\n\n1. Don't plan to drive Verdent headless. Hand the task to the person using the desktop app, or use a harness with a print mode\n2. Start large changes in Plan Mode and review plan.md before switching to Agent Mode\n3. Add MCP servers in the project's .mcp.json or ~/.verdent/mcp.json in the mcpServers shape\n4. Keep work under git, since rollback relies on git and there is no sandbox\n5. Budget in credits at about $0.059 each, because there is no free allowance since 29 October 2026\n\n## Questions\n\n### Which is better for AI agents, Pi or Verdent?\n\nPi scores 62.6 (B) on agent readiness against Verdent's 39.7 (E), and leads in every scored category.\n\n### Are Pi and Verdent open source?\n\nPi is open source (MIT). No open-source release is listed for Verdent.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/earendil-pi-vs-verdent.json, and with the fewest tokens: https://www.anchorterminal.com/compare/earendil-pi-vs-verdent.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"earendil-pi\", \"b\": \"verdent\"}`. From a terminal: `anchor compare earendil-pi verdent`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/earendil-pi.json and https://www.anchorterminal.com/api/v1/tools/verdent.json\n\n## Other comparisons with Pi or Verdent\n\n- [Agent Zero vs Pi](https://www.anchorterminal.com/compare/agent-zero-vs-earendil-pi.md)\n- [Agent Zero vs Verdent](https://www.anchorterminal.com/compare/agent-zero-vs-verdent.md)\n- [Aider vs Pi](https://www.anchorterminal.com/compare/aider-vs-earendil-pi.md)\n- [Aider vs Verdent](https://www.anchorterminal.com/compare/aider-vs-verdent.md)\n- [Amp vs Pi](https://www.anchorterminal.com/compare/amp-vs-earendil-pi.md)\n- [Amp vs Verdent](https://www.anchorterminal.com/compare/amp-vs-verdent.md)\n- [Antigravity CLI vs Pi](https://www.anchorterminal.com/compare/antigravity-cli-vs-earendil-pi.md)\n- [Antigravity CLI vs Verdent](https://www.anchorterminal.com/compare/antigravity-cli-vs-verdent.md)\n- [Auggie CLI vs Pi](https://www.anchorterminal.com/compare/auggie-vs-earendil-pi.md)\n- [Auggie CLI vs Verdent](https://www.anchorterminal.com/compare/auggie-vs-verdent.md)\n- [AXLR vs Pi](https://www.anchorterminal.com/compare/axlr-vs-earendil-pi.md)\n- [AXLR vs Verdent](https://www.anchorterminal.com/compare/axlr-vs-verdent.md)\n- [Claude Code vs Pi](https://www.anchorterminal.com/compare/claude-code-vs-earendil-pi.md)\n- [Claude Code vs Verdent](https://www.anchorterminal.com/compare/claude-code-vs-verdent.md)\n- [Cline vs Pi](https://www.anchorterminal.com/compare/cline-vs-earendil-pi.md)\n- [Cline vs Verdent](https://www.anchorterminal.com/compare/cline-vs-verdent.md)\n- [Conductor vs Pi](https://www.anchorterminal.com/compare/conductor-vs-earendil-pi.md)\n- [Conductor vs Verdent](https://www.anchorterminal.com/compare/conductor-vs-verdent.md)\n- [Crush vs Pi](https://www.anchorterminal.com/compare/crush-vs-earendil-pi.md)\n- [Crush vs Verdent](https://www.anchorterminal.com/compare/crush-vs-verdent.md)\n- [Cursor CLI vs Pi](https://www.anchorterminal.com/compare/cursor-cli-vs-earendil-pi.md)\n- [Cursor CLI vs Verdent](https://www.anchorterminal.com/compare/cursor-cli-vs-verdent.md)\n- [DeepSeek Harness (dsh) vs Pi](https://www.anchorterminal.com/compare/deepseek-harness-vs-earendil-pi.md)\n- [DeepSeek Harness (dsh) vs Verdent](https://www.anchorterminal.com/compare/deepseek-harness-vs-verdent.md)\n- [dsh-superagent (DeepSeek) vs Pi](https://www.anchorterminal.com/compare/deepseek-superagent-vs-earendil-pi.md)\n- [dsh-superagent (DeepSeek) vs Verdent](https://www.anchorterminal.com/compare/deepseek-superagent-vs-verdent.md)\n- [Devin vs Pi](https://www.anchorterminal.com/compare/devin-vs-earendil-pi.md)\n- [Devin vs Verdent](https://www.anchorterminal.com/compare/devin-vs-verdent.md)\n- [Droid CLI vs Pi](https://www.anchorterminal.com/compare/droid-cli-vs-earendil-pi.md)\n- [Droid CLI vs Verdent](https://www.anchorterminal.com/compare/droid-cli-vs-verdent.md)\n- [Pi vs Emdash](https://www.anchorterminal.com/compare/earendil-pi-vs-emdash.md)\n- [Pi vs Gemini CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-gemini-cli.md)\n- [Pi vs GitHub Copilot CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-github-copilot-cli.md)\n- [Pi vs goose](https://www.anchorterminal.com/compare/earendil-pi-vs-goose.md)\n- [Pi vs Harness²](https://www.anchorterminal.com/compare/earendil-pi-vs-harness2.md)\n- [Pi vs HarnessRouter](https://www.anchorterminal.com/compare/earendil-pi-vs-harnessrouter.md)\n- [Pi vs Jules](https://www.anchorterminal.com/compare/earendil-pi-vs-jules.md)\n- [Pi vs Junie CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-junie.md)\n- [Pi vs Kilo Code CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-kilo-code-cli.md)\n- [Pi vs Kimi Code CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-kimi-code-cli.md)\n- [Pi vs Kiro CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-kiro-cli.md)\n- [Pi vs Letta](https://www.anchorterminal.com/compare/earendil-pi-vs-letta.md)\n- [Pi vs mini-swe-agent](https://www.anchorterminal.com/compare/earendil-pi-vs-mini-swe-agent.md)\n- [Pi vs MiniMax Code](https://www.anchorterminal.com/compare/earendil-pi-vs-minimax-code.md)\n- [Pi vs Mistral Vibe CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-mistral-vibe-cli.md)\n- [Pi vs Muse Code](https://www.anchorterminal.com/compare/earendil-pi-vs-muse-code.md)\n- [Pi vs OpenAI Agents API](https://www.anchorterminal.com/compare/earendil-pi-vs-openai-agents-api.md)\n- [Pi vs OpenAI Codex](https://www.anchorterminal.com/compare/earendil-pi-vs-openai-codex.md)\n- [Pi vs OpenCode](https://www.anchorterminal.com/compare/earendil-pi-vs-opencode.md)\n- [Pi vs OpenHands](https://www.anchorterminal.com/compare/earendil-pi-vs-openhands.md)\n- [Pi vs OpenMausBot](https://www.anchorterminal.com/compare/earendil-pi-vs-openmausbot.md)\n- [Pi vs Orca](https://www.anchorterminal.com/compare/earendil-pi-vs-orca.md)\n- [Pi vs Paseo](https://www.anchorterminal.com/compare/earendil-pi-vs-paseo.md)\n- [Pi vs Prime Agent](https://www.anchorterminal.com/compare/earendil-pi-vs-prime-agent.md)\n- [Pi vs Qoder CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-qoder-cli.md)\n- [Pi vs Qwen Code](https://www.anchorterminal.com/compare/earendil-pi-vs-qwen-code.md)\n- [Pi vs Mirror CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-reflection-mirror.md)\n- [Pi vs Rovo Dev CLI](https://www.anchorterminal.com/compare/earendil-pi-vs-rovo-dev-cli.md)\n- [Pi vs Sculptor](https://www.anchorterminal.com/compare/earendil-pi-vs-sculptor.md)\n- [Pi vs T3 Code](https://www.anchorterminal.com/compare/earendil-pi-vs-t3-code.md)\n- [Pi vs Traycer](https://www.anchorterminal.com/compare/earendil-pi-vs-traycer.md)\n- [Pi vs Unstoppable](https://www.anchorterminal.com/compare/earendil-pi-vs-unstoppable.md)\n- [Pi vs Vibe-Trading](https://www.anchorterminal.com/compare/earendil-pi-vs-vibe-trading.md)\n- [Pi vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/earendil-pi-vs-warp.md)\n- [Emdash vs Verdent](https://www.anchorterminal.com/compare/emdash-vs-verdent.md)\n- [Gemini CLI vs Verdent](https://www.anchorterminal.com/compare/gemini-cli-vs-verdent.md)\n- [GitHub Copilot CLI vs Verdent](https://www.anchorterminal.com/compare/github-copilot-cli-vs-verdent.md)\n- [goose vs Verdent](https://www.anchorterminal.com/compare/goose-vs-verdent.md)\n- [Harness² vs Verdent](https://www.anchorterminal.com/compare/harness2-vs-verdent.md)\n- [HarnessRouter vs Verdent](https://www.anchorterminal.com/compare/harnessrouter-vs-verdent.md)\n- [Jules vs Verdent](https://www.anchorterminal.com/compare/jules-vs-verdent.md)\n- [Junie CLI vs Verdent](https://www.anchorterminal.com/compare/junie-vs-verdent.md)\n- [Kilo Code CLI vs Verdent](https://www.anchorterminal.com/compare/kilo-code-cli-vs-verdent.md)\n- [Kimi Code CLI vs Verdent](https://www.anchorterminal.com/compare/kimi-code-cli-vs-verdent.md)\n- [Kiro CLI vs Verdent](https://www.anchorterminal.com/compare/kiro-cli-vs-verdent.md)\n- [Letta vs Verdent](https://www.anchorterminal.com/compare/letta-vs-verdent.md)\n- [mini-swe-agent vs Verdent](https://www.anchorterminal.com/compare/mini-swe-agent-vs-verdent.md)\n- [MiniMax Code vs Verdent](https://www.anchorterminal.com/compare/minimax-code-vs-verdent.md)\n- [Mistral Vibe CLI vs Verdent](https://www.anchorterminal.com/compare/mistral-vibe-cli-vs-verdent.md)\n- [Muse Code vs Verdent](https://www.anchorterminal.com/compare/muse-code-vs-verdent.md)\n- [OpenAI Agents API vs Verdent](https://www.anchorterminal.com/compare/openai-agents-api-vs-verdent.md)\n- [OpenAI Codex vs Verdent](https://www.anchorterminal.com/compare/openai-codex-vs-verdent.md)\n- [OpenCode vs Verdent](https://www.anchorterminal.com/compare/opencode-vs-verdent.md)\n- [OpenHands vs Verdent](https://www.anchorterminal.com/compare/openhands-vs-verdent.md)\n- [Orca vs Verdent](https://www.anchorterminal.com/compare/orca-vs-verdent.md)\n- [Paseo vs Verdent](https://www.anchorterminal.com/compare/paseo-vs-verdent.md)\n- [Prime Agent vs Verdent](https://www.anchorterminal.com/compare/prime-agent-vs-verdent.md)\n- [Qoder CLI vs Verdent](https://www.anchorterminal.com/compare/qoder-cli-vs-verdent.md)\n- [Qwen Code vs Verdent](https://www.anchorterminal.com/compare/qwen-code-vs-verdent.md)\n- [Mirror CLI vs Verdent](https://www.anchorterminal.com/compare/reflection-mirror-vs-verdent.md)\n- [Rovo Dev CLI vs Verdent](https://www.anchorterminal.com/compare/rovo-dev-cli-vs-verdent.md)\n- [Sculptor vs Verdent](https://www.anchorterminal.com/compare/sculptor-vs-verdent.md)\n- [T3 Code vs Verdent](https://www.anchorterminal.com/compare/t3-code-vs-verdent.md)\n- [Traycer vs Verdent](https://www.anchorterminal.com/compare/traycer-vs-verdent.md)\n- [Verdent vs Vibe-Trading](https://www.anchorterminal.com/compare/verdent-vs-vibe-trading.md)\n- [Verdent vs Warp (Warp Agent CLI and the Oz Agent API)](https://www.anchorterminal.com/compare/verdent-vs-warp.md)\n- [Clawboo vs Verdent](https://www.anchorterminal.com/compare/clawboo-vs-verdent.md)\n- [CLI Manager vs Verdent](https://www.anchorterminal.com/compare/cli-manager-vs-verdent.md)\n- [Harness vs Verdent](https://www.anchorterminal.com/compare/harness-autonomous-vs-verdent.md)\n- [OpenMausBot vs Verdent](https://www.anchorterminal.com/compare/openmausbot-vs-verdent.md)\n- [Paperclip vs Verdent](https://www.anchorterminal.com/compare/paperclip-vs-verdent.md)\n- [Parallax vs Verdent](https://www.anchorterminal.com/compare/parallax-agents-vs-verdent.md)\n- [Unstoppable vs Verdent](https://www.anchorterminal.com/compare/unstoppable-vs-verdent.md)\n",
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